Why is Tryndamere the only champ to use a skin in the cinematics?

If they do have skins in future cinematics, they may as well go full throttle..

Astronaut teemo flying down from space on the back of Astro Nautilus, before choking him out with his own anchor, ripping off his space suit and revealing himself to be super Teemo. He then slams face first into Lucian who was JUST about to get his revenge on thresh. He blinds his ass and proceeds to shove 3 mushrooms down the purifiers throat while laughing none stop during the magical journey of Dark Passage.